streamtool getzkstate
The streamtool getzkstate command returns the status of the ZooKeeper servers.
Usage
getzkstate >>-+---------------------+--+---------+--+-----------------+----> '- --fmt--format-spec-' +- -h-----+ '- --trace--level-' '- --help-' >--+-----------------------+------------------------------------> '-+- -v--------+--level-' '- --verbose-' >--| Non-interactive tool options |---------------------------->< Non-interactive tool options (1) |--------+-----------------------------+------------------------| +- --embeddedzk---------------+ | .-,---------. | | V | | '- --zkconnect----host:port-+-'
- The non-interactive tool options are not supported in the interactive streamtool interface.
Authority
You do not need any authority to run this command.
Description
You can use this command with both the embedded ZooKeeper and external ZooKeeper. It provides more detailed information than the streamtool embeddedzk --status command.
- Status
- Specifies the state of the ZooKeeper server.
Possible status values include:
- DOWN
- Specifies that the server is down.
- LATENT
- Specifies that the server is initializing.
- NOT_SERVING
- Specifies that the server is running but is not yet serving data.
- SERVING
- Specifies that the server is running and serving data.
- Mode
- Specifies the mode of the ZooKeeper server.
Possible mode values include:
- FOLLOWER
- Specifies that the server is a follower in a multi-server ensemble.
- LEADER
- Specifies that the server is the leader in a multi-server ensemble.
- OBSERVER
- Specifies that the server is an observer in a multi-server ensemble.
- STANDALONE
- Specifies that it is a single-server ensemble.
- Average, minimum, and maximum latency
- Specify the time, in milliseconds, that the server spent receiving and processing requests.
- Connection count
- Specifies the number of clients that are connected to the ZooKeeper server.
- Requests outstanding
- Specifies the number of requests that were received but not yet processed.
- Version
- Specifies the version of ZooKeeper on the server.
If the specified ZooKeeper ensemble is not running, the command fails.
Options and arguments
- --embeddedzk
Specifies to use the embedded copy of ZooKeeper. This option is not supported within the interactive streamtool interface.
If you are not using the interactive streamtool interface and you do not specify either this option or the --zkconnect option, InfoSphere® Streams uses the ZooKeeper connection that is associated with the active domain or the domain that is specified in the --domain-id option. InfoSphere Streams determines which connection maps to the domain by using cached information about the domains. In this scenario, if the domain identifier is not unique in the InfoSphere Streams configuration cache, the command fails.
- --fmt format-spec
Specifies the presentation format. The command supports the following values:
- %Mf: Multiline record format. One line per field.
- %Nf: Name prefixed field table format. One line per host.
- %Tf: Standard table format, which is the default. One line per host.
- -h, --help
Specifies to show the command syntax.
- --trace level
Specifies the trace setting. The following valid levels are listed in order of increasing verbosity, which is to say that the first level in the list generates the least amount of information:
- off
- error
- warn
- info
- debug
- trace
- -v,--verbose level
Specifies to provide more detailed command output. The vebosity level can be from 0 to 3 where each increment provides more detailed output.
- --zkconnect host:port
The name of one or more host and port pairs that specify the configured ZooKeeper servers. This option is not supported within the interactive streamtool interface.
If you are not using the interactive streamtool interface and you do not specify this option, InfoSphere Streams tries to use:- The --embeddedzk option
- The value from the STREAMS_ZKCONNECT environment variable
- A ZooKeeper connection string that is derived from cached information about the current domain.
Examples
[streamtool <bsmith@StreamsDomain.StreamsInstance>] getzkstate
ZooKeeper ensemble state: UP
Server Status Mode Average latency Minimum latency Maximum latency ...
host1.ibm.com:40740 SERVING standalone 0 0 343